The barriers to enantiomerization of N-trimethylallyl-2-lithiopyrrolidine have been measured in the presence of sparteine,1, N,N'-diisopropylbispidine, 2, and diaminoalkoxide 3. We have additionally demonstrated a rare example of a catalytic dynamic resolution using either of two ligands, achieving enantiomer ratios of up to 93:7.
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Beng et al. (2009) studied this question.
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